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Interest Rates & Financing

Waterfront Tower-Condominium Prices Down 3.6%, Rents Up 2.9%, and Yield Rising from 2.76% to 2.95%

MFS's CAPS report says that AI-appraised prices for waterfront tower condominiums fell 3.6% from the start of the year, while rents rose 2.9% and the yield on the same home improved from 2.76% to 2.95%. Owners and prospective buyers should examine sale-listing reductions, cash flow after deducting expenses from rent, and the terms of deposit interest rates as separate matters.

Topic & Methodology

This original article investigates a newsworthy topic using the issuer's materials and our data. The materials used are listed under “Sources and passages reviewed.”

AI drafted this article from the source announcement and this site's data. Citations and figures were checked, with a separate AI call used for cross-checking. Verifiable facts are presented separately from conditional analysis, but these checks do not guarantee accuracy. This is neither a guarantee of future prices or returns nor a recommendation to buy or sell.

What the Source Confirms

Announcement: Lower Prices and Higher Rents for Waterfront Tower Condominiums

MFS's CAPS report says that the AI-appraised price of a waterfront tower-condominium 3LDK, standardized to 70 square meters, fell 3.6% from January through September 2026. [1]

The report says that rents rose 2.9% from January through September 2026. [2]

As a result, it reports that the yield measured on the same home improved from 2.76% to 2.95%. [3]

What the Source Confirms

Sale and Rental Listings and Price Reductions in Tokyo's 23 Wards

According to the tower-condominium information site's aggregation, 3,119 tower-condominium homes were listed for sale in Tokyo's 23 wards, with a median price of JPY 7.866 million per tsubo as of 2026-10-13. [4]

Another 2,764 homes were listed for rent, with a median rent of JPY 20,079 per tsubo per month as of 2026-10-13. [5]

Price revisions observed from 2026-10-07 through 2026-10-13 comprised 355 reductions and 6 increases among sale listings, and 221 reductions and 9 increases among rental listings. [6]

Conditional Analysis

Review Rent, Expenses, and Deposit Rates Separately

MFS's view is that as higher interest rates reduce borrowing capacity, a reassessment has begun of prices that rose ahead of fundamentals. Under that view, prospective buyers need to consider not only the size of asking-price adjustments but also, under their own borrowing terms, the monthly amount remaining after estimated management fees, repair reserve contributions, loan repayments, property taxes, and property-management fees are deducted from rent adjusted for the assumed occupancy rate. [7][8]

Rakuten Bank is conducting a limited-time fixed-term deposit campaign for corporate and individual business accounts from 2026-10-01 through 2026-11-30, with an annual rate of 1.675% for a two-year deposit. This is a deposit-product term, however, and cannot be treated as the same indicator as mortgage rates or the sale and rental cash flow of waterfront tower condominiums. [9][10]

The tower-condominium information site's investment-index assumptions do not reflect interior condition, views, management quality, repair plans, or other factors. An improved yield alone is therefore insufficient to determine whether ownership will be successful; each property must be reviewed individually. [11]

Limitations & Points to Verify

AI-Appraised Prices and Listing Revisions Cover Different Subjects and Dates

The prices in MFS's report are estimates based on AI appraisals, not actual transaction prices. By contrast, the tower-condominium information site's 355 reductions and 6 increases are counts of observed listing-price revisions. Because the subjects and dates differ, the two datasets cannot be joined to calculate the transaction-price change for the waterfront market. [12][6]

MFS says that nationwide rent growth shifted to flat this month, so these materials cannot establish whether rent growth will continue to support prices. In addition, the tower-condominium information site's investment index excludes homes whose listings do not state management fees or repair reserve contributions, and therefore may not represent the full amounts for every property. [13][14]

The materials do not provide the tax treatment, deduction amounts, or terms that apply when the repayment period is shortened, so the relationship between early repayment and the mortgage tax deduction cannot be determined from them. Special interest rates may also change without notice because of financial conditions and other factors, so they do not establish future borrowing costs. [15]

Sources and passages reviewed

Research and opinions belong to their respective publishers. Citations establish the basis of the analysis and do not guarantee future results.

  1. 株式会社MFS
    3LDK（70㎡換算）のAI査定価格が2026年1月から9月までに−3.6%と下落しています。

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  2. 株式会社MFS
    家賃は2026年1月から9月に＋2.9%と上昇し

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  3. 株式会社MFS
    同じ住戸で測った利回り（家賃×12ヶ月/マンション価格）は2.76%から2.95%に改善しています。

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  4. TOWERS.SELECT Aggregation
    東京23区のタワーマンションのデータ：売出中の住戸は3,119戸で、坪単価の中央値は786.6万円/坪（2026-10-13時点、標本3,119戸）。

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  5. TOWERS.SELECT Aggregation
    東京23区のタワーマンションのデータ：賃貸募集中の住戸は2,764戸で、坪賃料の中央値は20,079円/坪・月（2026-10-13時点、標本2,764戸）。

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  6. TOWERS.SELECT Aggregation
    東京23区のタワーマンションのデータ：2026-10-07から2026-10-13までに確認した価格改定は、売買で値下げ355戸・値上げ6戸、賃貸で値下げ221戸・値上げ9戸。

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  7. 株式会社MFS
    金利上昇で借入余力が縮む中で

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  8. Assumptions Behind TOWERS.SELECT's Investment Metrics
    想定の稼働率を反映した賃料から、管理費・修繕積立金・ローン返済・固定資産税等の概算・管理委託費を引いた月額。

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  9. 楽天銀行株式会社
    2026年10月1日（木）から2026年11月30日（月）まで

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  10. 楽天銀行株式会社
    円定期預金2年もの：年1.675%（税引後 年1.334%）

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  11. Assumptions Behind TOWERS.SELECT's Investment Metrics
    室内の状態、眺望、管理の状況、修繕の計画など、掲載から読み取れない条件は反映していない。

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  12. 株式会社MFS
    実際の成約価格ではなくAI査定に基づく推定値。

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  13. 株式会社MFS
    全国の家賃は今月「横ばい」に転じており

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  14. Assumptions Behind TOWERS.SELECT's Investment Metrics
    管理費や修繕積立金が掲載に書かれていない住戸は、0円として計算せず、対象から外している。

    Collected and aggregated:2026-10-13 23:23 (Japan time)

  15. 楽天銀行株式会社
    特別金利は、金融情勢等により予告なくその内容を変更する可能性があります。

    Collected and aggregated:2026-10-13 23:23 (Japan time)